Archips rosana

Archips rosana

Archips rosana (carcoma, gusano de la madera)

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This new window Lepidoptera achieves a wingspan close to 2.5 centimeters. The anterior wings are more or less pinkish brown, with dark brown markings, while the hind wings are gray with the apical yellow-orange area, more visible in the females.

Adults fly between May and September, depending on the location. The males are smaller and have brighter markings than the females.

The females deposit the eggs the end of summer on the bark of the trees and thus they will spend the winter. The caterpillars are green, darker on the top, with small black spots and hairiness. They feed on various fruit trees and cultivated plants, sheltering themselves in rolled leaves. Pupan in a cocoon on the same plant.

They are abundant in a large part of Europe, reaching the Polar circle in Scandinavia. They also appear in the coastal regions of North America.

Morphology: adult brown head and thorax, gray abdomen. Pale brown foundedings with 3 oblique darker spots whose middle is the largest, hindwings grayish brown with an orange apex and fringes. Larvae (caterpillar) about 20 mm long, usually green, but their color varies according to diet, with many pale hairs along the body, the head dark brown, the thorax covered by a brown plate Dark.

Life history: the females lay an average of 250 eggs in lots of 50-100 in the smooth bark or branches of the host trees (the apple is the favorite host), the eggs remain in diapause until next spring. Emerging larvae (caterpillars) remain and eat together, feed on buds and leaves, leaf litter and wind them, and then bite the flowers and fruits. They pupate at their feeding sites; the adults, who live several weeks, appear during the spring and the beginning of the summer; This species is univoltine. The development threshold was estimated at around 5-7ºC, and the total development of the female was estimated at around 520 days-degrees.

Economic importance: Although it attacks many crops, A. rosana is mainly a plague of apples and pears, roses and in North America also of hazelnut (Corylus avellana L.). The caterpillars gnaw and damage the pulp, the ovaries and the seeds or the stones of the fruits, which results in a corneal damage on the face of the apple and a premature fall. The curling of the leaf and the deformations, and the growth of the reduced tree can also follow.

Management:

Monitoring: The presence of reticulated and / or curly leaves, and of damage in the superficial feeding to the fruits in development are indications of presence of plagues.

Horticulture methods: elimination of the lower or weak branches.

ARRO P
Data sheet
Format
Septum
Duration
45 days / 6 weeks
Affects
Fruit trees
Units
1u

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Archips rosana

Archips rosana (carcoma, gusano de la madera)

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